400 to 512

Just a note: If you install any stroker kit in a B engine yourself, be prepaired to champher your own main bearings. It isn't hard but it must be done or atleast checked. It's stupid that they make bearings for the RB engine factory clearanced for the wide radius that is on a race crank but they don't make them for a B engine. I built a 473 using a 440 source kit. The first crank I got had too much runout. They took it back reballanced another crank and sent it to me. Just alittle FYI:read2: